There are a total of about 1,263,186 animal species documented on Earth, a count that increases by about 10,000 per year from new discoveries:

Animal group

Number of species

Vertebrates

Amphibians

6,199

Birds

9,956

Fish

30,000

Mammals

5,416

Reptiles

8,240

Subtotal

59,811

Invertebrates

Insects

950,000

Molluscs

81,000

Crustaceans

40,000

Corals

2,175

Others

130,200

Subtotal

1,203,375

Subtracting insect species, for which it is difficult to determine extinctions, gives a total currently known non-insect animal species of ~313,386.

Thus, the 127 animal extinctions over the past 100 years amounts to 0.04% of the currently known [and increasing] non-insect animal species.

At this rate of extinctions of 0.04% per century [which by the list below is not accelerating], it would take ~250,000 years to cause the "sixth mass extinction" that the usual alarmist outlets are crying wolf about, far longer than the onset of the next ice age [which would truly produce a mass extinction]. The fact is mass extinctions have naturally occurred 5 times before, well over 99.9% of the living species to have ever inhabited the Earth are now extinct, and it's not your fault.